User's Manual

392 Features
Emergency Services for Virtual Office
The E911 for Virtual Office feature allows Virtual Office users to place
an emergency call to the correct Public Safety Answering Point (PSAP)
for their geographic location. For more information about the E911 for
Virtual Office feature, see
Emergency Service Access Fundamentals
(NN43001-613).
Active Call Failover
The Active Call Failover (ACF) feature enables an IP Phone to reregister in
the ACF mode during a Signaling Server failure.
The ACF mode preserves the following
•
active media stream
• LED status of the Mute, Handsfree, and Headset keys
• DRAM content
All other elements (feature keys, soft keys and text areas) are retained
until the user presses a key or the connection with the Signaling Server
is resumed. If the user presses a key during the failover, the display is
cleared and a localized "Server Unreachable" message is displayed.
The IP Phone uses this new mode of reregistration only when the
Signaling Server explicitly tells the IP Phone to do so. IP Phones clear
all call information if they register to a Signaling Server or Line Terminal
Proxy Server (LTPS) that does not support the ACF feature.
For more information about Active Call Failover, see Signaling Server IP
Line Applications Fundamentals (NN43001-125).
Enhanced UNIStim Firmware download
Enhanced UNIStim firmware download feature provides the following
functionality for IP Phones
•
Enhanced firmware file header that includes the IT_TYPE and name
string for each IP Phone type.
• Revised definition of the IP Phone identification of the IP Phone Client.
• Maintenance Mode for the Signaling Server that allows more
simultaneous firmware downloads.
Maintenance Mode is not applicable to Voice Media Gateway Cards.
Nortel Communication Server 1000
IP Phones Fundamentals
NN43001-368 05.06 30 April 2010
Copyright © 2003-2010 Nortel Networks. All Rights Reserved.
.